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Evidence for a Nuclear Electric Quadrupole Moment for Sb^(123)

Tomboulian, D. H. and Bacher, R. F. (1940) Evidence for a Nuclear Electric Quadrupole Moment for Sb^(123). Physical Review, 58 (1). pp. 52-54. ISSN 0031-899X. doi:10.1103/PhysRev.58.52.

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Measurements of the hyperfine structure of the line λ5895 of Sb II by the use of a Fabry-Perot interferometer have shown that there are deviations from the interval rule in the case of the isotope with mass number 123. The hyperfine structure intervals of the ^3D_1 level of Sb^(121) (I=5/2) are found to be 0.6801 and 0.4832 cm^(−1). The corresponding intervals in Sb^(123) (I=7/2) are 0.4814 and 0.3603 cm^(−1). The error in these measurements is of the order of 0.001 cm. The observed ratio of the two separations gives 1.407 and 1.336 for the light and heavy isotope, respectively, whereas the corresponding ratios on the basis of the interval rule are 1.400 and 1.286. The deviation in the case of the light isotope is within the experimental error. The deviation for the heavy isotope, however, is a real effect which cannot be accounted for on the basis of perturbing effects of neighboring levels and must therefore be ascribed to the presence of an electric quadrupole moment of the nucleus of Sb^(123).

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Alternate Title:Evidence for a Nuclear Electric Quadrupole Moment for Sb123
Additional Information:© 1940 The American Physical Society. (Received May 11, 1940).
Issue or Number:1
Record Number:CaltechAUTHORS:20141105-110820758
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:51293
Deposited By: George Porter
Deposited On:05 Nov 2014 21:06
Last Modified:10 Nov 2021 19:08

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